BRNILES called for theologians, but wouldn't it be better to let the book speak for itself.
Gen 1:14 And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:

Whatever it was which caused the seasons, (which we know to be Earth's tilt)
had to have been since the start. :huh:
As for climate, keep in mind the first inhabitents of Earth lived in one area and did not migrate, until after they were expelled from Eden, which by the way was located exactly where Bagdad is today.

So only one climate on Earth was of concern then. The area where man took his first breath.
Ever since there have been many changes in climate all over the world for as many different reasons.

Here is another interesting tidbit.

Gen 2:5 And every plant of the field before it was in the earth, and every herb of the field before it grew: for the LORD God had not caused it to rain upon the earth, and [there was] not a man to till the ground.

Gen 2:6 But there went up a mist from the earth, and watered the whole face of the ground. :blink:

Which is to say there was no rain in the earliest days of the human race. The first record of rain occuring was the flood.

Gen 7:11b the same day were all the fountains of the great deep broken up, and the windows of heaven were opened.

Gen 7:12 And the rain was upon the earth forty days and forty nights

Gen 7:20 Fifteen cubits upward did the waters prevail; and the mountains were covered.

Interesting enough, if the polar ice caps were melted, the Earth would be covered with exactly that much water.
Now how did the ancent mythologists figure all this out? <_<
And how do you suppose that boat got up on mount Arrat? Perhaps it was aliens.